Vacuum cleaner



FIG. 1 is a front view of a vacuum cleaner showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a side view of the opposite side of FIG. 3; and,

FIG. 5 is a top view thereof. 

I claim the ornamental design for a vacuum cleaner, as shown and described. 